Same results.
63% fewer tokens.

Mixdog is a free, open-source coding agent. Connect your existing Claude, ChatGPT, Grok, or Muse Code subscription with no extra fees.

Download for Windows GitHub

Free · Available for Windows, macOS, and Linux

Open source · Apache-2.0Star on GitHub →

How it works

1
Download and sign in
Install the desktop app and sign in with a ChatGPT, Claude, Grok, or Muse Code account, or paste an API key.
2
A strong model plans
Give it a task or a goal. A high-performance model plans the work.
3
Cheaper models do the work
Several cheaper models search, edit, and review in parallel, with the editor, terminals, Git, and GitHub in the same window.

Same model, same score.
Less than half the tokens.

Tested across all 89 Terminal-Bench 2.1 tasks with 445 trials per agent, both running GPT-5.6 Sol xhigh.

View method and raw data →

Total tokens (including cached input) · Terminal-Bench 2.1

Mixdog 156.5M

Codex CLI 421.4M

86.5%Success rateCodex CLI 86.1%
$0.476Cost per trialCodex CLI $0.782
87 of 89Tasks with fewer tokens

Scored with the official Harbor verifier using unmodified timeouts and zero retries. Compared to Claude Code on Claude Opus 5, Mixdog cost 19% less and solved 2 more tasks.

How we stop token leaks

67%
Lighter first request
System instructions and tool descriptions include only what the model needs: 4.7k tokens vs. 14.4k for Codex CLI.
33%
Fewer round trips
Selects the right tools upfront and batches independent steps: only 10 requests per trial vs. 16 for Codex CLI.
46%
Smaller final context
Tools return only what was requested, and 95% of terminal output is filtered out before it reaches the model: 18.5K vs. 34.3K tokens of final context.
8%
Shorter responses
Reduces filler and repetition in model replies.

Context efficiency →

Everything in one window

Ask once, get it fixed.

Finds failing tests, fixes the bugs, and reruns the suite. Three bugs fixed in 12 seconds.

From solo to swarm.

A strong model plans the work, while cheaper models search, edit, and review in parallel.

Run tasks side by side.

Split the window and assign different tasks to completely independent sessions.

Editor, terminal, Git, and GitHub built in.

Edit code with language server support, preview and edit Markdown, CSV, PDF, and Office files, run tests, commit, and open PRs without leaving the app.

Track every single token.

View tokens and costs by provider and model, plus your quota limits and reset times.

More capabilities

Works autonomously

Goal execution
Give it a goal and the session works on its own until it's done.
Schedules & webhooks
Trigger tasks on a timer or via a custom URL.
Mobile app
Pair your iPhone or Android phone with a QR code, continue sessions end-to-end encrypted, and get notified when work finishes.
Command line
Use the same agent in your terminal, or run one-shot tasks headlessly with mixdog exec.

Beyond code

Browser control
Navigate and interact with real, signed-in web pages.
Computer control
Operate native Windows and macOS applications.
Document editing
Create and edit Word, Excel, PowerPoint, and PDF files.
Media studio
Generate and edit images and videos, saving them to a local gallery.

Built-in tools

Auto reasoning effort
A small local model picks the right reasoning effort for every message and tool step in about 0.1 s. On by default.
Memory
Remembers important details and searches through past work.
Code Graph & Code Tidy
Queries your code structure, then formats, lints, and fixes it.
Local models
Download and run models completely locally on your GPU.

Coming soon

Place

A Notion- and Jira-style workspace inside Mixdog, right beside your agents.

Team Place, later

Team Place will bring shared workspaces to your whole team. Neither is released yet.

Open code. Open benchmark.

Licensed under Apache-2.0. Verdicts, verifier outputs, usage snapshots, and the exact scripts to recompute every number on this page are available in our repository.

GitHub → View benchmark data → Changelog →

Command line · Node.js 22.19+ or 24+

$ npm install -g mixdog
$ mixdog

Documentation

Frequently asked questions

Is it really free?

Yes. The Mixdog app is free and open source under the Apache-2.0 license. You only pay for model usage directly to the providers, using your own subscriptions or API keys.

Which subscriptions and API keys work?

We support Claude account sign-in and Anthropic API keys, ChatGPT/Codex account sign-in and OpenAI API keys, Google Gemini API keys, Grok account sign-in and xAI API keys, Muse Code (Meta) account sign-in, plus OpenRouter, DeepSeek, and OpenCode Go.

What operating systems are supported?

The desktop app runs on Windows x64, macOS (Apple Silicon and Intel), and Linux (x64 and ARM64, AppImage or .deb, glibc 2.31+). On Intel Macs, auto reasoning effort and semantic memory search aren't available. The command-line version requires Node.js 22.19+ (22.x) or 24+.

How did you measure the 63% savings?

We ran all 89 Terminal-Bench 2.1 tasks five times each (445 trials per agent). Both used the exact same model, reasoning level, unmodified timeouts, and resources. We allowed zero retries and scored them with the official Harbor verifier. All logs and scripts are public.

Can I run models on my local GPU?

Yes. Using the built-in local provider, you can download and run models directly inside the app. Currently, this requires a Windows x64 machine with an NVIDIA GPU.

Windows SmartScreen shows a warning. Is that expected?

The Windows installer and app are code-signed, and the Mac app is signed and notarized. If SmartScreen still appears, choose 'More info', then 'Run anyway'.

Download, sign in, done.

Forget complicated config files and YAML. Follow a quick five-step tutorial and you're ready to go.

Download for Windows

Windows

macOS

Linux

TerminalNode.js 22.19+ or 24+

npm install -g mixdog

Same results.63% fewer tokens.